1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40ff97149b3669078464642193d1a9980d702496455351a271198cbc5087732. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c3f4249c-8b1c-4fcd-a32d-4995df2ad8d6.json and https://artists.proofprofile.net/proofs/artist/c3f4249c-8b1c-4fcd-a32d-4995df2ad8d6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
En svensk Markuspassion: Recitative. Det var två dagar/Inte under själva helgen
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1089048c20541afda6370e62a7de1114562e6af3e30d01729d4bc33c0d12087f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAGA0802020.
En svensk Markuspassion: Recitative. Medan han var i Betania/Vilket slöseri med balsam/Och de grälade
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62582f1daecc842bfd1820679892c318df9537bb7da648faa7a7d61fd8d73749. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAGA0802030.
En svensk Markuspassion: Recitative. Första dagen/Vart vill du att vi skall gå/Då skickade i våg
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c41bfdcfb1b661f7cd7bd2d74e02b94a948634198dad538163e026cd7e7f69. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAGA0802060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d27a03e0b3d7ab428a51e801bf2537dc72cfca60e4995040aa0887656a981b6. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEPXS9209010.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
En svensk Markuspassion (Excerpts): Introduction. Han var föraktad och övergiven av alla
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x042e339da4bbc8710dd06ff97793635fd812a05b04b7b6965fddd0cc3dfd52ed. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAGA0802010.
En svensk Markuspassion: Arioso. Låt henne vara!/Men Judas Iskariot
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb845cd6ae12abd215990dc688b8216ae232639f46238ce388ea21c0b9eb7599. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAGA0802040.
En svensk Markuspassion: Chorale I: Var inte orolig
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa1b57b00fb5f3e78ad798c1347956104763e2e57dcac9c60edc86aefb467db4. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAGA0802050.
En svensk Markuspassion: Arioso. Gå in till staden/Recitative. Lärjungarna gav sig iväg
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b23f4549131ce568ab3576dd8cdc6c6a761d34da4398edb568be458b7dec9c0. Chain 2 (Bitcoin): anchored in block 960305 (2026-07-30T20:14:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAGA0802070.
En svensk Markuspassion: Chorale II: Snart doften av brödet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9896a7f595a280dd8277435e53320ac587522bcd0a070f6110b0d8174dcaa53. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAGA0802080.
En svensk Markuspassion: Recitative. På kvällen kom han dit/Sannerligen, en av er/Recitative. Då blev de bedrövade
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb768c06ce53733393152157b838db8c692686ba9f46046929cc8a3c5902d45b. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAGA0802090.